ISB ~ Galatians 5 v14

the whole law:The chief aim of the Torah is to promote the love of God, neighbor, and self (Mt 22:34-40; Rom 13:8-10). Jesus lived this intention of the Law to perfection, so that the law of love has become the “law of Christ” (Gal 6:2; 1 Cor 9:21). Our ability to fulfill this law is made possible by the grace of the Spirit (Rom 5:5; 8:4).

You shall love your neighbor:A citation from Lev 19:18. Observance of this law was sorely needed in Galatia, where the Judaizing crisis spawned bitterness and strife between fellow Christians (Gal 5:15).

• It may be asked why the apostle mentions love of neighbor but not love of God. Yet who can love his neighbor if he does not love God, since it is only by the gift of God that one can love his neighbor? Since neither precept can be observed unless the other is observed, it suffices to mention one of them (St. Augustine, Exposition of Galatians 45).